Nithya Priya, V and Rajkumar, M. and Mobika, J and Linto Sibi, S P (2020) Removal of As (V) in water using β-Cyclodextrin intercalated Fe-Al layered double hydroxide/reduced Graphene Oxide nanocomposites. Synthetic Metals. ISSN 0379-6779

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Abstract

Highly effective nanoadsorbent based on β-Cyclodextrin intercalated Fe-Al layered double hydroxide/reduced
Graphene Oxide (FAH-rGO/CD) nanocomposites were synthesized through hydrothermal and ex-situ polymerization process for As (V) adsorption in wastewater. Characterization results of XRD, FESEM and HRTEM reveals
the crystalline structure and morphology of the FAH-rGO/CD nanocomposites. The elemental composition and
functional groups of the composites were investigated by EDS and FTIR. N2 adsorption-desorption analysis was
utilized to determine the surface area of the prepared nanocomposite and the incorporated β-CD moieties enhances the surface area of FAH-rGO (145.35 m2
g− 1
). Various adsorption parameters of nanoadsorbents such as
the effect of pH, contact time, adsorbent dosage, adsorption isotherms and kinetics were studied and reported.
The obtained adsorption isotherm data of synthesized adsorbent was properly fitted with Langmuir isotherm
model along with their maximum monolayer adsorption capacity of 185.52 mg g− 1 for As (V). The Pseudo-first
and second kinetic models were used to assess the kinetic data and the adsorption of As (V) pursued the Pseudo
second order model with high correlation co-efficient R2 value (0.9836). Moreover, as-synthesized adsorbents
had good recyclability up to 89%, even after five adsorption-desorption analysis. Meanwhile, the presence of coexisting anions on sorption of As (V) was evaluated and their results indicate that, the high concentration of
phosphate and carbonate ions inhibited the efficiency of As (V) removal. Thus, high surface area with abundant
oxygen containing hydroxyl groups and magnetic properties of FAH-rGO/CD nanocomposites proved to be
highly effective adsorbent for As (V) removal in wastewater.

Item Type: Article
Uncontrolled Keywords: Layered double Hydroxide β-cyclodextrin Reduced Graphene oxide As (V) adsorption
Divisions: PSG College of Arts and Science > Department of Physics
Depositing User: Mr Team Mosys
Date Deposited: 14 Mar 2023 07:22
Last Modified: 14 Mar 2023 07:22
URI: http://ir.psgcas.ac.in/id/eprint/1768

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